Look, it's a nice sounding narrative with a sprinkle of truth, but it proves a lot less than it sounds like it does.

There were specific reasons historical communism had such a large death toll, and it traces back mostly to the policies that were introduced and the decisions the political elite made.

So I think it's fair to compare actual policies, and not to judge on the basis of whether someone calls themselves a communist, or whether that label gets applied to them.

To my knowledge, Die Linke is not a revolutionary party, doesn't want to force through breakneck industrialization at any cost, and doesn't deny foundational agricultural science. It's also one of the few parties defending the Informationsfreiheitsgesetz (public access to government records) against the current government's push to gut it.